56 Transactions of the South African Philosophical Society. 



of 4 ; the height of the rhinophores 1-5 ; the entirely everted gill 

 projected 2 mm., the diameter of the gill-star 6 mm., the length 

 of the leaves up to 3 ; the brim of the back 1-5, the breadth of 

 the foot 4 and the length of the tail 3 mm.— The colour clear 

 reddish white, the brim of the back chalk-white. 



The back quite even ; the very fine gill with its 15 leaves 

 (tig. 18) mostly extending out horizontally ; the anal papilla sub- 

 median ; the caudal and frontal veil about 1-5 mm. broad, the 

 white brim finely punctuated ; the tail projecting behind the 

 back. 



The diameter of the eyes 0-10 mm., the lens very clear yellow. 

 The diameter of the otocysts 0-08. The brim of the back filled 

 with sacks of very different size, stuffed with vesicles mostly 

 004 mm. in diameter. 



The length of the mouth tube 2 mm. The whitisb hulhus 

 2)har!jngeus with the (fig. 19) prominent rasp-sheath 3 mm. long by a 

 breadth of 2. The very strong (fig. 19) lip plate reddish brown, 

 the elements, which were variously bent (fig. 20), of a length up to 

 0'06 by a diameter of nearly 0005 mm. The rasp of the tongue 

 yellowish, with many series of plates and a great number of 

 plates in the series. The plates of usual form (fig. 23) and all with 

 finely denticulated hook. On the very narrow rhachis small 

 triangular pseudo-plates (fig. 21fl) of a length short of 004 mm. 

 The innermost plates denticulated as usual on both sides of the 

 hook, 0030 mm. high (fig. 21), the next 004 mm. high (fig. 22), the 

 outermost about 8-10 plates only denticulated at the point (fig. 24). 



The liver on the outside gray, in section black, 8 mm. long by a 

 breadth of 3 and a thickness of 2-5, sausage-shaped ; its fore-end 

 and upper side covered by the whitish yellow hermaphrodite gland. 

 The anterior genital mass whitish yellow, about 3-5 mm. long ; the 

 penis 1-5 mm. long. 



This form is different from the 13 species of Chromodoris 

 described by Eliot {I.e., iv., 1904, pp. 386-399) from Zanzibar; 

 perhaps it is identical with one of the many species described from 

 the Indo-Pacific Seas. 



2. Chromodokis euelpis,'- B. n. sp. 

 PI. VI., figs. 14-17. 

 One specimen was procured off Umloti River mouth by large 

 dredge from a depth of 45 fms. and a hard bottom of sand and shells 

 on December is. 1900. 



• 'Ki'tX-cf, Good Hope. 



